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linux/drivers/gpu/drm/imagination
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Michal Wilczynski 3a2b7389fe
drm/imagination: Add reset controller support for GPU initialization 
All IMG Rogue GPUs include a reset line that participates in the
power-up sequence. On some SoCs (e.g., T-Head TH1520 and Banana Pi
BPI-F3), this reset line is exposed and must be driven explicitly to
ensure proper initialization.  On others, such as the currently
supported TI SoC, the reset logic is handled in hardware or firmware
without exposing the line directly. In platforms where the reset line is
externally accessible, if it is not driven correctly, the GPU may remain
in an undefined state, leading to instability or performance issues.

This commit adds a dedicated reset controller to the drm/imagination
driver.  By managing the reset line (where applicable) as part of normal
GPU bring-up, the driver ensures reliable initialization across
platforms regardless of whether the reset is controlled externally or
handled internally.

Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com>
Reviewed-by: Matt Coster <matt.coster@imgtec.com>
Link: https://lore.kernel.org/r/20250418-apr_18_reset_img-v6-2-85a06757b698@samsung.com
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
 		2025-04-24 11:08:48 +01:00
..
Kconfig drm/imagination: Implement job submission and scheduling 2023-11-23 09:01:47 +01:00
Makefile drm/imagination: Add RISC-V firmware processor support 2025-04-15 12:21:52 +01:00
pvr_ccb.c drm/imagination: Convert to use time_before macro 2024-08-30 15:17:03 +01:00
pvr_ccb.h drm/imagination: Implement firmware infrastructure and META FW support 2023-11-23 09:01:46 +01:00
pvr_cccb.c drm/imagination: Implement context creation/destruction ioctls 2023-11-23 09:01:46 +01:00
pvr_cccb.h drm/imagination: Numerous documentation fixes. 2023-11-28 18:56:03 +01:00
pvr_context.c drm for 6.13-rc1 2024-11-21 14:56:17 -08:00
pvr_context.h drm/imagination: Break an object reference loop 2024-11-04 09:41:38 +00:00
pvr_debugfs.c drm/imagination: loop counters moved to loop scope 2025-04-07 10:09:40 +01:00
pvr_debugfs.h drm/imagination: Add firmware trace to debugfs 2023-11-23 09:01:47 +01:00
pvr_device.c drm/imagination: Add reset controller support for GPU initialization 2025-04-24 11:08:48 +01:00
pvr_device.h drm/imagination: Add reset controller support for GPU initialization 2025-04-24 11:08:48 +01:00
pvr_device_info.c drm/imagination: Fixed warning due to implicit cast to bool 2023-12-04 09:41:34 +01:00
pvr_device_info.h drm/imagination: Add GPU ID parsing and firmware loading 2023-11-23 09:01:46 +01:00
pvr_drv.c drm/imagination: Add support for TI AM68 GPU 2025-04-15 12:21:52 +01:00
pvr_drv.h drm: remove driver date from struct drm_driver and all drivers 2024-12-05 12:35:42 +02:00
pvr_free_list.c drm/imagination: loop counters moved to loop scope 2025-04-07 10:09:40 +01:00
pvr_free_list.h drm/imagination: Implement free list and HWRT create and destroy ioctls 2023-11-23 09:01:46 +01:00
pvr_fw.c drm/imagination: Add RISC-V firmware processor support 2025-04-15 12:21:52 +01:00
pvr_fw.h drm/imagination: Add RISC-V firmware processor support 2025-04-15 12:21:52 +01:00
pvr_fw_info.h drm/imagination: Numerous documentation fixes. 2023-11-28 18:56:03 +01:00
pvr_fw_meta.c drm/imagination: Use callbacks for fw irq handling 2025-04-15 12:21:51 +01:00
pvr_fw_meta.h drm/imagination: Implement firmware infrastructure and META FW support 2023-11-23 09:01:46 +01:00
pvr_fw_mips.c drm/imagination: Move ELF fw utils to common file 2025-04-15 12:21:52 +01:00
pvr_fw_mips.h drm/imagination: Ensure PVR_MIPS_PT_PAGE_COUNT is never zero 2024-04-29 12:31:28 +01:00
pvr_fw_riscv.c drm/imagination: Add RISC-V firmware processor support 2025-04-15 12:21:52 +01:00
pvr_fw_startstop.c drm/imagination: Add RISC-V firmware processor support 2025-04-15 12:21:52 +01:00
pvr_fw_startstop.h drm/imagination: Implement firmware infrastructure and META FW support 2023-11-23 09:01:46 +01:00
pvr_fw_trace.c drm/imagination: avoid unused-const-variable warning 2025-04-24 10:51:55 +01:00
pvr_fw_trace.h drm/imagination: avoid unused-const-variable warning 2025-04-24 10:51:55 +01:00
pvr_fw_util.c drm/imagination: Move ELF fw utils to common file 2025-04-15 12:21:52 +01:00
pvr_gem.c drm/imagination: Use cached memory with dma_coherent 2025-04-15 12:21:52 +01:00
pvr_gem.h drm/imagination: Use cached memory with dma_coherent 2025-04-15 12:21:52 +01:00
pvr_hwrt.c drm/imagination: loop counters moved to loop scope 2025-04-07 10:09:40 +01:00
pvr_hwrt.h drm/imagination: Numerous documentation fixes. 2023-11-28 18:56:03 +01:00
pvr_job.c Merge drm/drm-fixes into drm-misc-fixes 2025-04-08 10:15:47 +02:00
pvr_job.h drm/imagination: Implement job submission and scheduling 2023-11-23 09:01:47 +01:00
pvr_mmu.c drm/imagination: Use cached memory with dma_coherent 2025-04-15 12:21:52 +01:00
pvr_mmu.h drm/imagination: Add GEM and VM related code 2023-11-23 09:01:46 +01:00
pvr_params.c drm/imagination: Add firmware trace to debugfs 2023-11-23 09:01:47 +01:00
pvr_params.h drm/imagination: Add firmware trace to debugfs 2023-11-23 09:01:47 +01:00
pvr_power.c drm/imagination: Add reset controller support for GPU initialization 2025-04-24 11:08:48 +01:00
pvr_power.h drm/imagination: Add power domain control 2025-04-15 12:21:50 +01:00
pvr_queue.c Merge drm/drm-fixes into drm-misc-fixes 2025-04-08 10:15:47 +02:00
pvr_queue.h drm/imagination: avoid deadlock on fence release 2025-03-03 12:07:56 +00:00
pvr_rogue_cr_defs.h drm/imagination: Update register defs for newer GPUs 2025-04-15 12:21:50 +01:00
pvr_rogue_cr_defs_client.h drm/imagination: Add GPU register headers 2023-11-23 09:01:45 +01:00
pvr_rogue_defs.h drm/imagination: Add GPU register headers 2023-11-23 09:01:45 +01:00
pvr_rogue_fwif.h drm/imagination: Add FWIF headers 2023-11-23 09:01:46 +01:00
pvr_rogue_fwif_check.h drm/imagination: Add FWIF headers 2023-11-23 09:01:46 +01:00
pvr_rogue_fwif_client.h drm/imagination: Add FWIF headers 2023-11-23 09:01:46 +01:00
pvr_rogue_fwif_client_check.h drm/imagination: Add FWIF headers 2023-11-23 09:01:46 +01:00
pvr_rogue_fwif_common.h drm/imagination: Add FWIF headers 2023-11-23 09:01:46 +01:00
pvr_rogue_fwif_dev_info.h drm/imagination: Add FWIF headers 2023-11-23 09:01:46 +01:00
pvr_rogue_fwif_resetframework.h drm/imagination: Add FWIF headers 2023-11-23 09:01:46 +01:00
pvr_rogue_fwif_sf.h drm/imagination: Fix a couple of spelling mistakes in literal strings 2023-11-28 13:55:37 +01:00
pvr_rogue_fwif_shared.h drm/imagination: Add FWIF headers 2023-11-23 09:01:46 +01:00
pvr_rogue_fwif_shared_check.h drm/imagination: Add FWIF headers 2023-11-23 09:01:46 +01:00
pvr_rogue_fwif_stream.h drm/imagination: Add FWIF headers 2023-11-23 09:01:46 +01:00
pvr_rogue_heap_config.h drm/imagination: Add firmware and MMU related headers 2023-11-23 09:01:45 +01:00
pvr_rogue_meta.h drm/imagination: Add firmware and MMU related headers 2023-11-23 09:01:45 +01:00
pvr_rogue_mips.h drm/imagination: Add firmware and MMU related headers 2023-11-23 09:01:45 +01:00
pvr_rogue_mips_check.h drm/imagination: Add firmware and MMU related headers 2023-11-23 09:01:45 +01:00
pvr_rogue_mmu_defs.h drm/imagination: Add firmware and MMU related headers 2023-11-23 09:01:45 +01:00
pvr_rogue_riscv.h drm/imagination: Add RISC-V firmware processor support 2025-04-15 12:21:52 +01:00
pvr_stream.c drm/imagination: loop counters moved to loop scope 2025-04-07 10:09:40 +01:00
pvr_stream.h drm/imagination: Implement context creation/destruction ioctls 2023-11-23 09:01:46 +01:00
pvr_stream_defs.c drm/imagination: Implement job submission and scheduling 2023-11-23 09:01:47 +01:00
pvr_stream_defs.h drm/imagination: Implement context creation/destruction ioctls 2023-11-23 09:01:46 +01:00
pvr_sync.c drm/imagination: Implement job submission and scheduling 2023-11-23 09:01:47 +01:00
pvr_sync.h drm/imagination: Implement job submission and scheduling 2023-11-23 09:01:47 +01:00
pvr_vm.c drm/imagination: Hold drm_gem_gpuva lock for unmap 2025-03-03 12:09:00 +00:00
pvr_vm.h drm/imagination: Hold drm_gem_gpuva lock for unmap 2025-03-03 12:09:00 +00:00
pvr_vm_mips.c drm/imagination: loop counters moved to loop scope 2025-04-07 10:09:40 +01:00
pvr_vm_mips.h drm/imagination: Implement MIPS firmware processor and MMU support 2023-11-23 09:01:46 +01:00